Crinoid "Feather Stars" Columnal Segments rockinaboxatlasaurus For millions of years

For millions of years

The scarcity of gold in Mesopotamia led to the development of trade routes designed to obtain the precious metal

When possible

The specimen in the Core Sample was recovered from deposits near Glendive

The material was removed while extracting the lower jaw of a Xiphactinus

Crinoid "Feather Stars" Columnal Segments rockinaboxatlasaurus For millions of yearsSometimes referred to as feather stars or sea lilies, Crinoids are members of an extended and very ancient family of sea animals known as echinoderms. Echinoderms date back as far as the Cambrian period some 541,000,000 years ago. They include such varied animals as sea urchins, sea cucumbers, and starfish. Their development was part of a much larger explosion of complex life on Earth which resulted in most of the animal or metazoan body plans we know